This is, I submit, stretching a point. The only real Creation, of Something from Nothing, occurred at the Big Bang.
As Genesis 1:1 says, in the Beginning God created the Heavens and the Earth. To my mind, at this point God created the Universe and set it in motion based on the Laws he had created for it to run by.
This does not, of course, mean that thereafter He could not interfere and modify the results of those laws when and where he saw fit. He pretty clearly did so when Christ was incarnated, and no doubt in many if not all of the Biblical miracles.
But these were not Creations, in the pure sense. In the examples you give, Christ did not Create healthy skin or eye from nothing, he simply healed the existing body parts that were diseased. In the case of Lazarus and his other raisings from the dead, he did not Create a live body from nothing, he restored life to an existing though dead body.
Humans themselves have developed capabilities to heal living but diseased bodies in ways that would at the time of Christ have been considered miraculous. Depending on your definition of Death, we have even brought deceased people back to life, and our abilities in this direction are likely to improve.
To my mind this shows that Man's abilities and potentials, he being made in the Image of God, overlap with those of God. As He intended.
However, only He can create health and life merely with a word (fiat). He proved this over and over again.
If He can do this with a word it is not a stretch to believe that he can create ex nihilo with the same. He said "let there be light" and there was light. The point of this scripture is to show that God's intended result happened directly as a result of His command. No mention of a lag in time.
Jesus Himself said "In the beginning God created them male and female". No mention of intermediate stages. God is mightier than any other force. He is able to do just what His Word says.